One quick note: the in-editor browser already has its own bookmarks bar. Click the star in the address bar on the page you want, or press Cmd+D, and the bookmarks bar will show up under the URL bar.
Right now, these bookmarks are stored separately from the ones in the Agents Window and are tied to the workspace, so the list you built in the Agents Window doesn’t sync over yet. Having a shared set of bookmarks for both browsers makes sense, I’ll pass that idea to the team.